T27.4 - A Comprehensive Control Scheme for CM Resonance Suppression and Current Quality Improvement with DPWM Method in ILCL-Filtered Grid-Connected Inverter

Thursday, March 23, 2023

9:30 AM – 9:50 AM ET

Location: W103

Authors: Zicheng Zhang , Xiaoyan Li , Hongliang Zhang , Chenghui Zhang

Technical Lecture Presenter(s)

Huizhong Sun

Aalborg University, Denmark

Handouts

The common-mode (CM) resonance suppression and current quality improvement for the improved LCL (ILCL) filtered grid-connected inverter with discontinuous pulse width modulation (DPWM) are the tough tasks. In this paper, the exciting sources of CM resonance are analyzed in detail; then a comprehensive control scheme is proposed to ensure the robust stability of the CM loop and improve current quality with high inverter’s efficiency using DPWM. With the proposed method, the CM resonance can be suppressed without sacrificing the DPWM performance. Simulation results show the effectiveness of the proposed method.